JP2008215265A - Vehicle display device - Google Patents

Abstract

An object of the present invention is to display a rotational speed of an internal combustion engine and an over-rotation region of the internal combustion engine without causing anxiety to the driver during a shift of a vehicle including the internal combustion engine.
An ECU starts monitoring a shift position and an engine speed NE (S100), determines whether or not a manual downshift operation has been performed by a driver (S102), and a manual downshift operation. When the engine speed NE is smaller than the downshift permission rotational speed (YES in S106), a step of transmitting a command to change the red zone to the high speed side to the tachometer 9000 is determined. A program including (S110) and a step (S112) of transmitting a manual downshift execution command to the automatic transmission 2000 is executed.
[Selection] Figure 6

Description

  The present invention relates to a display device for a vehicle, and more particularly to a display device for the number of revolutions of an internal combustion engine provided in the vehicle.

  2. Description of the Related Art Conventionally, an instrument (hereinafter also referred to as a tachometer) including a dial displaying a scale of engine speed and a pointer that rotates on the dial based on the engine speed is well known. On the dial of such a tachometer, an over-rotation region (hereinafter also referred to as a red zone) that may affect the durability of the engine and the running performance of the vehicle is displayed in red, for example. It is displayed in a mode different from the rotation area. In other words, in order for the driver to recognize that the engine speed may increase and reach the engine speed (so-called over-rev engine speed) that may affect the durability of the engine or the running performance of the vehicle, The number of revolutions obtained by subtracting a predetermined marginal number of revolutions from the overrev revolution number is displayed on the dial as a red zone. A technique related to such a tachometer is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-325108 (Patent Document 1).

  The vehicular instrument disclosed in this publication corrects and displays the motor speed of the prime mover of a vehicle that drives the drive wheels via a transmission connected to the prime mover. The vehicle instrument is based on a means for detecting the prime mover rotational speed X of the prime mover, a means for detecting the shift speed of the transmission, the detected shift speed, and the detected prime mover rotational speed X. And means for correcting the prime mover rotational speed X to obtain the display rotational speed Y, and means for displaying the calculated display rotational speed Y.

According to the vehicular instrument disclosed in this publication, for example, the rotation speed to be displayed on the instrument is set so as not to exceed the red zone start rotation speed. Can be set based on. As a result, for example, when displaying the motor speed of a vehicle equipped with an automatic transmission having a different speed at the time of upshifting depending on the gear position, it is possible to suppress shifting at positions above the red zone. it can. Therefore, it is possible to suppress the driver from feeling uncomfortable.
JP 2004-325108 A

  However, in the vehicle instrument disclosed in Patent Document 1, only the engine speed at the time of upshift is considered, and the engine speed at the time of downshift is not taken into consideration at all. That is, after the downshift, the gear ratio becomes larger than before the downshift, and therefore the engine speed after the downshift increases rapidly. As described above, when the engine speed is steeply rising at a position where the engine speed does not exceed the red zone in spite of the fact that the engine speed is actually increasing rapidly, anxiety is given to the driver.

  The present invention has been made to solve the above-described problems, and its object is to operate the rotational speed of the internal combustion engine and the overspeed region of the internal combustion engine at the time of gear shifting of the vehicle equipped with the internal combustion engine. It is an object of the present invention to provide a display device that can display without giving anxiety to a person.

  A display device according to a first invention is a display device for a vehicle provided with an internal combustion engine. The display device includes an indicator that indicates an index corresponding to the rotational speed of the internal combustion engine, and a display corresponding to the index, the rotational speed affecting at least one of the durability of the internal combustion engine and the running performance of the vehicle. The size of the over-rotation region is controlled based on the display unit that displays the over-rotation region according to the condition, the determination means for determining whether or not the condition regarding the shift is satisfied, and whether or not the condition is satisfied And control means.

  According to the first invention, an indicator corresponding to the rotational speed of the internal combustion engine is indicated by the indicator, and the rotational speed that affects at least one of the durability of the internal combustion engine and the running performance of the vehicle corresponding to the indicator. The over-rotation region corresponding to the is displayed on the display unit. The size of the over-rotation region is controlled based on whether or not a condition regarding gear shifting is satisfied. For example, when the downshift condition is satisfied, the overspeed region is controlled to be on the high rotation side as compared with the case where the downshift condition is not satisfied. Therefore, at the time of shifting, the indicator according to the actual rotational speed of the internal combustion engine can be indicated by the indicator, and the indicator indicated by the indicator can be prevented from entering the over-rotation region displayed by the display. . As a result, it is possible to provide a display device that can display the rotational speed of the internal combustion engine and the over-rotation region of the internal combustion engine without giving a sense of incongruity to the driver at the time of shifting the vehicle equipped with the internal combustion engine. .

  In the display device according to the second invention, in addition to the configuration of the first invention, the determining means includes means for determining whether or not a downshift condition is satisfied. The control means includes means for controlling the over-rotation region to be on the high rotation side when the down-shift condition is satisfied as compared to when the down-shift condition is not satisfied.

  According to the second invention, when the downshift condition is satisfied, the over-rotation region is controlled to be on the high rotation side as compared with the case where the downshift condition is not satisfied. Therefore, even if the rotational speed of the internal combustion engine increases after the downshift, it is possible to suppress the index indicated by the instruction unit from entering the overspeed region.

  In the display device according to the third invention, in addition to the configuration of the first or second invention, in the internal combustion engine, the durability of the internal combustion engine is affected more than the first rotational speed that affects the output of the internal combustion engine. The second rotational speed exerting the When the downshift condition is not satisfied, the control unit performs control so that the overspeed region has a size corresponding to the first rotational speed, and when the downshift condition is satisfied, the overspeed region Includes means for controlling so as to be a magnitude corresponding to the second rotational speed.

  According to the third invention, the second rotational speed that affects the durability of the internal combustion engine is higher than the first rotational speed that affects the output of the internal combustion engine. When the downshift condition is not satisfied, the overspeed region is controlled to a size corresponding to the first rotational speed. Therefore, the driver can drive the vehicle without reducing the output of the internal combustion engine by visually recognizing the index indicated by the instruction unit and the overspeed region. On the other hand, when the downshift condition is satisfied, the overspeed region is controlled to a size corresponding to the second rotational speed. That is, the size of the over-rotation region is changed so as to display a higher rotation side. Therefore, even if the rotation speed of the internal combustion engine rises to the first rotation speed due to the downshift, it is possible to suppress the index indicated by the instruction unit from entering the overspeed region.

  In the display device according to the fourth invention, in addition to the configuration of the third invention, the internal combustion engine is a diesel engine.

  According to the fourth invention, the internal combustion engine is a diesel engine. Generally, a diesel engine has a second rotational speed that affects the durability of the internal combustion engine higher than a first rotational speed that affects the output of the internal combustion engine. When a vehicle equipped with such a diesel engine is downshifted, it is possible to prevent the index indicated by the instruction unit from entering the overspeed region.

  The display device according to a fifth aspect of the present invention further includes a detecting means for detecting that a shift is requested by the driver of the vehicle, in addition to the configuration of any one of the first to fourth aspects of the invention. The determining means includes means for determining that a condition related to shifting is established when it is detected by the detecting means that shifting is required.

  According to the fifth aspect, the size of the over-rotation region is controlled when it is detected that a shift is requested by the driver of the vehicle. Therefore, for example, when the driver requests a downshift for the purpose of deceleration by the engine brake (that is, after the downshift, the driver does not request the output of the internal combustion engine), the rotational speed of the internal combustion engine is Even if the speed increases to the first rotational speed, the index indicated by the instruction unit does not enter the over-rotation region. Thereby, it can suppress giving an unnecessary anxiety to a driver | operator.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  A vehicle equipped with a display device according to an embodiment of the present invention will be described with reference to FIG. This vehicle is an FF (Front engine Front drive) vehicle. A vehicle other than FF may be used.

  The vehicle includes an engine 1000, an automatic transmission 2000, a planetary gear unit 3000 constituting a part of the automatic transmission 2000, a hydraulic circuit 4000 constituting a part of the automatic transmission 2000, a differential gear 5000, a drive shaft 6000, Front wheel 7000 and ECU (Electronic Control Unit) 8000 are included.

  Engine 1000 is a diesel engine that burns fuel injected from an injector (not shown) in a combustion chamber of a cylinder (not shown). The piston in the cylinder is pushed down by the combustion, and the crankshaft is rotated.

  Automatic transmission 2000 is connected to engine 1000 via torque converter 3200. Automatic transmission 2000 changes the rotational speed of the crankshaft to a desired rotational speed by forming a desired gear stage.

  The output gear of automatic transmission 2000 is meshed with differential gear 5000. A drive shaft 6000 is connected to the differential gear 5000 by spline fitting or the like. Power is transmitted to the left and right front wheels 7000 via the drive shaft 6000.

  The ECU 8000 includes a vehicle speed sensor 8002, a shift position sensor 8006 of a shift lever 8004, an accelerator opening sensor 8010 of an accelerator pedal 8008, a stroke sensor 8014 of a brake pedal 8012, and a throttle opening sensor 8018 of an electronic throttle valve 8016. The engine speed sensor 8020, the input shaft speed sensor 8022, and the output shaft speed sensor 8024 are connected via a harness or the like.

  Vehicle speed sensor 8002 detects the speed of the vehicle from the rotational speed of drive shaft 6000 and transmits a signal representing the detection result to ECU 8000.

  Shift position sensor 8006 detects the position of shift lever 8004 movably provided along a shift path formed in shift gate 100 and transmits a signal representing the detection result to ECU 8000.

  Accelerator opening sensor 8010 detects the opening of accelerator pedal 8008 and transmits a signal representing the detection result to ECU 8000.

  Stroke sensor 8014 detects the stroke amount of brake pedal 8012 and transmits a signal representing the detection result to ECU 8000.

  The throttle opening sensor 8018 detects the opening (throttle opening) of the electronic throttle valve 8016 whose opening is adjusted by the actuator, and transmits a signal representing the detection result to the ECU 8000.

  Engine speed sensor 8020 detects the rotational speed (engine speed) NE of the output shaft (crankshaft) of engine 1000 and transmits a signal representing the detection result to ECU 8000.

  Input shaft rotational speed sensor 8022 detects input shaft rotational speed (hereinafter also referred to as turbine rotational speed) NT of automatic transmission 2000, and transmits a signal representing the detection result to ECU 8000. Output shaft rotational speed sensor 8024 detects output shaft rotational speed NO of automatic transmission 2000 and transmits a signal representing the detection result to ECU 8000. Since the output shaft of engine 1000 is connected to the input shaft of torque converter 3200, and the output shaft of torque converter 3200 is connected to the input shaft of automatic transmission 2000, engine rotational speed NE is input to torque converter 3200. The rotation speed is the same as the rotation speed of the shaft. Further, the input shaft rotation speed of automatic transmission 2000 is the same as the rotation speed of the output shaft of torque converter 3200.

  ECU 8000 sends from vehicle speed sensor 8002, shift position sensor 8006, accelerator opening sensor 8010, stroke sensor 8014, throttle opening sensor 8018, engine speed sensor 8020, input shaft speed sensor 8022, output shaft speed sensor 8024, and the like. Based on the received signals, a map and a program stored in a ROM (Read Only Memory), the devices are controlled so that the vehicle is in a desired running state.

  Further, tachometer 9000 is connected to ECU 8000 via a harness. The ECU 8000 transmits a control signal to the tachometer 9000 so that a value corresponding to the engine speed NE received from the engine speed sensor 8020 is displayed on the tachometer 9000. The tachometer 9000 will be described in detail later.

  In the present embodiment, ECU 8000, when shift lever 8004 is positioned at the D (drive) position and D (drive) range is selected as the shift range of automatic transmission 2000, for example, 1st to 6th speeds, etc. Automatic transmission 2000 is controlled such that one of the plurality of gear stages is formed. The automatic transmission 2000 can transmit a driving force to the front wheels 7000 by forming any one of the plurality of gear stages.

  The shift gate 100 will be described with reference to FIG. As shown in FIG. 2, a shift passage 102 is formed in the shift gate 100. Shift lever 8004 is provided to be movable along shift passage 102. A plurality of shift positions are set in the shift passage 102. The plurality of shift positions are described as, for example, a forward position (hereinafter referred to as (D) position), a neutral position (hereinafter referred to as (N) position), and a parking position (hereinafter referred to as (P) position). ) And a reverse position (hereinafter referred to as (R) position). The shift gate 100 is formed so that the shift lever 8004 can move from the position corresponding to the (P) position to the (R) position, (N) position, and (D) position on the lower side of the drawing in FIG.

  A sub gate 104 is connected to the shift passage 102. The shift passage 102 is connected to the central portion of the sub-gate 104 in the vertical direction of the drawing in FIG. A shift position (hereinafter referred to as (S) position) corresponding to a manual transmission mode limited to a gear ratio according to the gear selected by the driver is set at the center of the sub-gate 104. When the shift lever 8004 is moved from the (D) position to the right in FIG. 2, the (S) position is reached.

  In the sub-gate 104, when the shift lever 8004 is moved from the (S) position in the upward direction on the paper surface of FIG. 2, the shift lever 8004 reaches the (+) position, and when the shift lever 8004 is moved downward in the paper surface of FIG. Note that the shape of the shift gate 100 is not particularly limited thereto. Further, the shift gate 100 may be provided in the driver's seat so that the upward direction in the drawing of FIG. 2 is the front direction of the vehicle, or the upward direction of the drawing in FIG. Thus, it may be provided in the driver's seat.

  The driver operates the shift lever 8004 along the shift passage 102 formed in the shift gate 100 to move the shift lever 8004 to a desired position (shift position). The driver can select the power transmission state of automatic transmission 2000 by changing the position of shift lever 8004.

  When the driver moves the shift lever 8004 to the (D) position, a signal indicating that the (D) position has been selected is transmitted from the shift position sensor 8006. When ECU 8000 receives a signal indicating that the (D) position has been selected from shift position sensor 8006, ECU 8000 controls the vehicle in the automatic transmission mode. Specifically, ECU 8000 controls automatic transmission 2000 (hydraulic circuit 4000) so as to change the gear ratio (input shaft speed NT / output shaft speed NO) according to the state of the vehicle.

  When the driver moves the shift lever 8004 to the (S) position, a signal indicating that the (S) position is selected is transmitted from the shift position sensor 8006. When the driver receives a signal from the shift position sensor 8006 indicating that the driver has moved the shift lever 8004 from the (S) position to the (+) position (hereinafter also referred to as (+) operation), the ECU 8000 selects it. The changed gear stage is changed to a gear stage one stage higher than the current gear stage. On the other hand, when the driver receives a signal indicating that the shift lever 8004 has moved from the (S) position to the (−) position (hereinafter also referred to as (−) operation) from the shift position sensor 8006, the ECU 8000 The gear selected by is changed to a gear that is one speed lower than the current gear.

  The tachometer 9000 will be described with reference to FIG. Tachometer 9000 includes a rotation speed area 9090, a pointer 9020, and a red zone display 9100.

  The rotation speed area 9090 displays a range that the engine rotation speed NE can take in an arc shape. The rotation speed area 9010 represents a higher rotation speed as it goes clockwise with the left end as the 0 position.

  The pointer portion 9020 is provided so as to rotate about the rotation shaft 9022, and indicates a specific position on the rotation speed region 9010 as an index corresponding to the engine rotation speed NE.

  The red zone display unit 9100 displays a specific rotation speed area on the rotation speed area 9090 so as to overlap with the rotation speed area 9010.

  The pointer unit 9020 and the red zone display unit 9100 are controlled by the ECU 8000. Based on a control signal from ECU 8000, pointer unit 9020 is controlled so that a position corresponding to engine rotational speed NE is indicated on rotational speed region 9010.

  Based on the control signal from ECU 8000, red zone display unit 9100 displays either a red zone determined by the output characteristics of engine 1000 or a red zone determined by the durability of engine 1000 on rotation speed region 9010. Controlled. In addition, the display color of the red zone display unit 9100 is controlled to be displayed in a different red color from other regions so that the driver can immediately determine the red zone.

  With reference to FIG. 4, the red zone displayed on the red zone display part 9100 which concerns on this Embodiment is demonstrated.

  Engine 1000 according to the present embodiment is a diesel engine. In general, as shown in FIG. 4, in the diesel engine, when the engine speed NE rises to a predetermined speed NE (1), the engine torque TE decreases rapidly, so that the running performance of the vehicle is good. Cannot be maintained. Therefore, a red zone determined by the output characteristics of the engine 1000 is equal to or higher than the rotational speed NE (2) obtained by subtracting a predetermined marginal rotational speed from NE (1).

  On the other hand, as shown in FIG. 4, the diesel engine deteriorates the durability of the engine 1000 when the engine rotational speed NE rises to a rotational speed NE (3) higher than NE (1). Therefore, a rotational speed NE (4) (> NE (1)) or more obtained by subtracting a predetermined margin rotational speed from NE (3) is a red zone determined by the durability of engine 1000. In the present embodiment, a diesel engine will be described. However, the display device according to the present invention can be applied to any engine in which the rotational speed at which the output torque rapidly decreases and the rotational speed at which the durability deteriorates are different. The engine is not limited to this.

  With reference to FIG. 5, a functional block diagram of the display device according to the present embodiment will be described. As shown in FIG. 5, the display device includes a manual downshift request determination unit 8100, a downshift permission determination unit 8200, a red zone display control unit 8300, and a downshift execution unit 8400.

  Manual downshift request determination unit 8100 determines whether or not the driver has requested a manual downshift based on a signal transmitted from shift position sensor 8006.

  Downshift permission determination unit 8200 determines whether or not to permit downshifting based on the determination result of manual downshift request determination unit 8100 and the signal from engine speed sensor 8020.

  The red zone display control unit 8300 transmits a control signal to the tachometer 9000 based on the determination result of the downshift permission determination unit 8200.

  Downshift execution unit 8400 transmits a control signal to automatic transmission 2000 based on the determination result of downshift permission determination unit 8200.

  The display device according to the present embodiment having such a functional block is read from a CPU (Central Processing Unit) and a memory and a memory included in the ECU even with hardware mainly composed of a digital circuit or an analog circuit. It can also be realized by software mainly composed of programs executed by the CPU. In general, it is said that it is advantageous in terms of operation speed when realized by hardware, and advantageous in terms of design change when realized by software. In the following, a case where a display device is realized as software will be described. Note that a recording medium on which such a program is recorded is also an embodiment of the present invention.

  With reference to FIG. 6, a control structure of a program executed by ECU 8000 constituting the display device according to the present embodiment will be described. Note that this program is repeatedly executed at a predetermined cycle time.

  In step (hereinafter step is abbreviated as S) 100, ECU 8000 starts monitoring the shift position and engine speed NE based on signals from shift position sensor 8006 and engine speed sensor 8020.

  In S102, ECU 8000 determines whether or not a manual downshift operation has been performed by the driver based on a signal from shift position sensor 8006. If it is determined that a manual downshift operation has been performed (YES in S102), the process proceeds to S106. Otherwise (NO in S102), the process proceeds to S104.

  In S104, ECU 8000 transmits a command for displaying the red zone to the low rotation side to tachometer 9000. Specifically, ECU 8000 transmits to tachometer 9000 a command for displaying a red zone (see FIG. 4) determined by the output characteristics of engine 1000 on red zone display unit 9100.

  In S106, ECU 8000 determines whether engine speed NE is smaller than the downshift permission speed. If engine speed NE is smaller than the downshift permission speed (YES in S106), the process proceeds to S108. Otherwise (NO in S106), the process proceeds to S104.

  In S108, ECU 8000 transmits a command for changing the red zone to the high rotation side to tachometer 9000. Specifically, ECU 8000 issues a command to change the red zone displayed on red zone display unit 9100 from a red zone determined by the output characteristics of engine 1000 to a red zone determined by the durability of engine 1000 (see FIG. 4). , To the tachometer 9000.

  In S110, ECU 8000 transmits a manual downshift execution command to automatic transmission 2000.

  In S112, ECU 8000 determines whether engine speed NE is smaller than a predetermined engine speed NE (2) or not. Note that the predetermined rotational speed NE (2) is a lower limit value of the red zone determined by the output characteristics of the engine 1000, as shown in FIG. If engine speed NE is smaller than predetermined speed NE (2) (YES in S112), the process proceeds to S114. Otherwise (NO in S112), the process returns to S112.

  In S114, ECU 8000 transmits a command for changing the red zone to the low rotation side to tachometer 9000. Specifically, ECU 8000 transmits to tachometer 9000 a command to change the red zone displayed on red zone display unit 9100 from the red zone determined by the durability of engine 1000 to the red zone determined by the output characteristics of engine 1000. .

  An operation of tachometer 9000 controlled by the display device according to the present embodiment based on the structure and the flowchart as described above will be described.

  First, it is assumed that a manual upshift operation is performed by the driver during traveling in a region where the engine speed NE is high (NO in S102). As shown in FIG. 7B, when the upshift is performed from the N stage to the (N + 1) stage at time T (1), the gear ratio becomes small. The engine speed decreases. Therefore, if the engine speed NE is lower than the lower limit value NE (2) of the red zone determined by the output characteristics of the engine 1000 before the upshift, the engine speed NE will not exceed NE (2) after the upshift.

  Therefore, as shown in FIG. 8, the red zone determined by the output characteristics of the engine 1000 is displayed on the red zone display unit 9100 (S104). Therefore, the driver can drive the vehicle without reducing the output of engine 1000 by visually recognizing pointer portion 9020 and red zone display portion 9100.

  Next, it is assumed that the driver performs a manual downshift operation while traveling in a region where the engine speed NE is high. As shown in FIG. 9 (B), when the downshift is performed from the (N + 1) stage to the N stage at time T (2), the gear ratio increases. Therefore, as shown in FIG. Thereafter, the engine speed NE increases. Therefore, as shown in FIG. 9A, even if the engine speed NE is lower than the lower limit value NE (2) of the red zone determined by the output characteristics of the engine 1000 before the downshift, the engine speed after the downshift is reached. The number NE may exceed NE (2).

  Here, it is considered that the driver is requesting deceleration by the engine brake instead of acceleration by downshifting in a region where the engine speed NE is high. Therefore, it is considered that it is not necessary for the driver to check with the tachometer 9000 whether or not the engine speed NE has entered the red zone determined by the output characteristics of the engine 1000.

  Therefore, when a manual downshift operation is performed by the driver (YES in S102), if engine speed NE is smaller than the downshift permission rotational speed (YES in S106), red as shown in FIG. The red zone displayed on the zone display unit 9100 is changed from the red zone determined by the output characteristics of the engine 1000 to the red zone determined by the durability of the engine 1000 (that is, the red zone on the high rotation side) (S108). As a result, a downshift is executed at time T (2) (S110), and even if the engine speed NE rises beyond NE (2), the pointer portion 9020 is prevented from entering the red zone. Therefore, compared with the case where the red zone is not changed, the driver can be prevented from feeling uneasy.

  As described above, according to the display device according to the present embodiment, when the driver performs a manual downshift operation, the size of the red zone displayed on the tachometer is changed to the high rotation side. Therefore, even if the engine speed increases after the downshift, it is possible to prevent the pointer indicating the engine speed from entering the red zone. Therefore, the engine speed and the red zone can be displayed on the tachometer without giving the driver anxiety.

  In the present embodiment, the case of changing the display of the red zone when the driver performs a manual downshift operation has been described. For example, when the automatic downshift by the ECU is performed, the red zone is displayed. The display may be changed.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the structure of the vehicle by which the display apparatus which concerns on embodiment of this invention is mounted. It is a figure which shows the shape of the shift gate in embodiment of this invention. It is a figure (the 1) which shows the tachometer in embodiment of this invention. It is a figure which shows the relationship between the engine speed and engine torque in embodiment of this invention. 1 is a functional block diagram of a display device according to an embodiment of the present invention. It is a flowchart which shows the control structure of ECU which comprises the display apparatus which concerns on embodiment of this invention. It is a timing chart (the 1) of the engine speed and gear stage in embodiment of this invention. It is a figure (the 2) which shows the tachometer in embodiment of this invention. It is a timing chart (the 2) of the engine speed and gear stage in embodiment of this invention. It is a figure (the 3) which shows the tachometer in embodiment of this invention.

Explanation of symbols

  100 shift gate, 102 shift passage, 104 sub gate, 1000 engine, 2000 automatic transmission, 3000 planetary gear unit, 3200 torque converter, 4000 hydraulic circuit, 5000 differential gear, 6000 drive shaft, 7000 front wheel, 8002 vehicle speed sensor, 8004 shift lever, 8006 Shift position sensor, 8008 Accelerator pedal, 8010 Accelerator position sensor, 8012 Brake pedal, 8014 Stroke sensor, 8016 Electronic throttle valve, 8018 Throttle position sensor, 8020 Engine speed sensor, 8022 Input shaft speed sensor, 8024 Output shaft speed Number sensor, 9000 tachometer, 9010 rotation speed region, 90 0 pointer part, 9022 axis of rotation, 9100 Red zone display unit.

Claims (5)

A display device for a vehicle including an internal combustion engine,
An indicator that indicates an index according to the rotational speed of the internal combustion engine;
A display corresponding to the indicator, and a display unit for displaying an overspeed region corresponding to a rotational speed that affects at least one of durability of the internal combustion engine and travelability of the vehicle;
Determining means for determining whether or not a condition relating to gear shifting is satisfied;
And a control means for controlling the size of the over-rotation region based on whether or not the condition is satisfied. The determining means includes means for determining whether or not a downshift condition is satisfied,
The control means includes means for controlling, when a downshift condition is satisfied, control so that the over-rotation region is on a higher rotation side than when the downshift condition is not satisfied. The display device described. In the internal combustion engine, the second rotational speed that affects the durability of the internal combustion engine is higher than the first rotational speed that affects the output of the internal combustion engine,
When the downshift condition is not satisfied, the control means controls the over-rotation region to have a size corresponding to the first rotation speed, and when the downshift condition is satisfied. The display device according to claim 1, further comprising means for controlling the over-rotation region to have a size corresponding to the second rotation speed.   The display device according to claim 3, wherein the internal combustion engine is a diesel engine. The display device further includes detection means for detecting that a shift is requested by a driver of the vehicle,
The said judgment means contains the means for judging that the conditions regarding the said speed change were satisfied, when it is detected that the said speed change is requested | required by the said detection means. Display device.

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